<template>
  <div class="dashboard-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" :min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>
          <!--
      v-show：是否显示上传组件
      :key：类似于id，如果一个页面多个图片上传控件，可以做区分
      :url：后台上传的url地址
      @close：关闭上传组件
      @crop-upload-success：上传成功后的回调 
        <input type="file" name="file"/>
      -->
          <image-cropper
                        v-show="imagecropperShow"
                        :width="300"
                        :height="300"
                        :key="imagecropperKey"
                        :url="BASE_API+'/ossservice/upload'"
                        field="file"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>
      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
import teacher from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
    components: { ImageCropper, PanThumb },
    data() { // 定义变量和初始值
        return {
            teacher: {},
            imagecropperShow:false, // 上传弹框组件是否显示
            imagecropperKey:0, // 上传组件key值
            BASE_API:process.env.BASE_API, // 获取dev.env.js里面地址
            saveBtnDisabled: false // 保存按钮是否禁用
        }
    },
    created() { // 页面渲染之前执行，一般调用methods中定义的方法
        this.init()
    },
    watch: { // 监听
        $route(to, from) { // 路由发生变化，方法就会执行
            this.init()
        }
    },
    methods: { // 创建具体的方法，调用teacher.js中定义的方法
        init() {
            if (this.$route.params && this.$route.params.id) {
                const id = this.$route.params.id
                this.getTeacher(id)
            } else {
                this.teacher = {
                    avatar: ''
                }
            }
        },
        saveOrUpdate() {
            if (!this.teacher.id) {
                this.saveTeacher()
            } else {
                this.updateTeacher()
            }
        },
        saveTeacher() {
            teacher.addTeacher(this.teacher).then(response => {
                this.$message({
                    type: 'success',
                    message: '添加成功！'
                })
            })
            this.$router.push({path: '/teacher/table'})
        },
        getTeacher(id) {
            teacher.getTeacherById(id).then(response => {
                this.teacher = response.data.teacher
            })
        },
        updateTeacher() {
            teacher.updateTeacher(this.teacher).then(response => {
                this.$message({
                    type: 'success',
                    message: '修改成功！'
                })
            })
            this.$router.push({path: '/teacher/table'})
        },
        close() {
            this.imagecropperShow = false
            this.imagecropperKey = this.imagecropperKey + 1
        },
        cropSuccess(data) {
            this.imagecropperShow = false
            this.teacher.avatar = data.url
            this.imagecropperKey = this.imagecropperKey + 1
        }
    }
}
</script>
